What is Geist Expander: Japanese Drum Machines?

Can the sounds be used in other software or hardware samplers?

Yes, individual samples can be used in any device that can load and play back 24-bit, 44.1 kHz WAV/AIFF/RX2 files. Note that the Geist kit files cannot be loaded in any other software/hardware, but the samples referenced by the kits can be loaded.